Q: What supergroup is Gracilaria in? Is this protist prokaryotic or eukaryotic?
A: Eukaryotes Eukaryotes are either unicellular or multicellular organisms with advanced cellular sub…
Q: Why does reductive acetogenesis predominate overmethanogenesis in many termites?
A: Acetogens are bacteria capable of producing acetate from H2and CO2 using the acetyl-CoA pathway…
Q: What prevents other bacteria from colonizing the dead insectand competing with the nematode and…
A: E.coli is a gram-negative bacteria that is a facultative anaerobe (microbes that can even survive in…
Q: Name two groups of protists known to cause HABs in marine ecosystems. What hazards do HABs pose for…
A: HAB is the harmful algal bloom that is caused by the rapid growth of the algae in the aquatic…
Q: IDENTIFY: Which phase of the Polysiphonia life cycle is completely parasitic?
A: Ans: Polysiphonia: The polysiphonia is a red alga and also has about 19 species and found on British…
Q: What are some of the approaches biologists have been trying to reduce transmission of the parasites…
A: Malaria is a disease that spreads incredibly efficiently. The antimalarial medicines that are…
Q: How has an understanding of crown gall disease benefitedplant agriculture?
A: Agrobacterium tumefaciens is a rod-shaped gram-negative bacteria that leads to a type of…
Q: What is obligate parasite?
A: A Parasite that cannot complete its life cycle without exploiting the host is called an obligate…
Q: Why might overwatering your plants make them more susceptible to infection by some kinds of…
A: Answer- Overwatering plants can be really harmful to the plants in many ways, they can clog the…
Q: Explain gamatangial copulation in Fungi.
A: Sexual reproduction in fungi takes place between two compatible nuclei. Gamentangial copulation is…
Q: What is the significance of a specialization at one end of the colony?
A: they are located at the end of the colony it means that there is polarity and there are large number…
Q: Why are termites essential members of communities in nature? How do they alter habitats?
A: Termites are eusocial insects, which are believed to have evolved from cockroaches. They are also…
Q: What are the similarities between the life cycle of Symbion Pandora and Plasmodium (commonly known…
A: Life cycle of Plasmodium falciparum. Three primary stages can be distinguished according to whether…
Q: why current taxonomy divides these organisms into six different super groups rather than lumping…
A: Kingdom Protista is usually called dumping phylum because it has all kinds of organisms. There are…
Q: Why are Frankia spp. considered ecologically important?
A: Frankia is a genus of bacteria which, fix nitrogen and live in symbiosis with actinorhizal plants,…
Q: Which nematode infects the roots of tobacco plant and causes a great reduction in yield?
A: Nematodes or roundworms constitute the phylum Nematoda. They are triploblasts and occur as parasites…
Q: Why would a parasite develop a life cycle involving an intermediate hosts? What is this giving the…
A: Introduction: Parasites are organisms that depended on another life form, serving, for food,…
Q: what is the only known coccidial parasite that does not have intermediate hosts?
A: An organism that harbors the parasites with nourishment and space (as shelter) is considered a host.…
Q: What are the advantages and disadvantages to a solitary versus colonial existence?
A: Animals of this planet may live in groups and may live alone or solitary. The behavior of all the…
Q: Why should organisms with low annual survival rates begin to reproduce at an early age?
A: An organism's life history or life cycle includes its size, age, patterns of development (birth,…
Q: Why are bacterial spores not considered to be true reproductive bodies like the spores of yeasts and…
A: A spore can be described as a cell that certain fungi, plants (moss, ferns), and bacteria produce.…
Q: Why doesn’t the evolutionary history of Plasmodium follow the classical host–parasite co-speciation…
A: Co-speciation is a type of coevolution where the speciation of one species influences the speciation…
Q: Imagine you are in a developing country where sanitation is poor. Having read about paracitic…
A: Protists are eukaryotes that do not belong to aminal, fungi, or plant kingdom however they share a…
Q: Why can it be said that N. equitans is both a carbon and anenergy parasite?
A: Introduction: Nanoarchaeum equitans is a hyperthermophilic obligate symbiont that grows in…
Q: What is the evolutionary significance of protista?
A: The kingdom Protista consists of unicellular eukaryotic organisms. This group exhibits a remarkable…
Q: Is there a common evolutionary pathway between host and parasite?
A: Introduction Microbes are not only pathogenic to humans but they are beneficial for Humans too.…
Q: Which of the following is a ctenophore known to have reduced the invasive Black Sea population of…
A: Non chordates are those organism which do not possess notochord. Central nervous system is ventral ,…
Q: what is a colonial flagellate hypothesis? How colonial organisms differ from multicellular?Which…
A: An organ or organism that is consisting of numerous cells is known as multicellular. Plants,…
Q: What stage of development of the malaria parasite is the ringform?
A: Fever, sweating, and shaking chills are some indicators of malaria disease. It is an infectious…
Q: Why does a parasitic organism not have to be a parasite?
A: Parasite is an organism that lives in or on the body of other organisms and derive nutrients from…
Q: In Figure 2a and 2d, what can you determine about the ability of the parasite to infect its host?
A: Evolution is the gradual process by which organisms adapt to their changing environments in order to…
Q: Do parasite-host systems tend to be host-specialist or generalist? Explain.
A: Parasites are organism that cannot survive on it's own. It lives on hosts. Hosts supports the…
Q: What are the differences between direct and indirect life cycles? Give two (2) representative…
A: Parasites are the organisms which lives and reproduce inside other organisms known as host.
Q: How is reproduction done inbeings of the class Reptilia?
A: Reptiles are tetrapods, which comprise air-breathing vertebrates covered by a special skin made of…
Q: What parasite is commonly mistaken as Entamoeba histolytica
A: Parasites are organisms that derive their nutrition from other organisms that are known as hosts.…
Q: Which of the following applies to Malaria? Choose all that apply. Group of answer choices It is a…
A: Disease is any state of any physiological deviation from being normal. Disease can be infectious or…
Q: The eukaryotic parasites of humans include two groups. Which one of these does not belong?
A: Eukaryotic organisms are more advanced organisms than prokaryotes. Eukaryotes have a membrane-bound…
Q: ymbiosis has had a role in eukaryotic development?
A: Endosymbiosis is the process where small cells are engulfed by large cells and inside the large…
Q: What is a lichen? Why is this considered an example of a parasite-host relationship? Why might you…
A: Ecology is the branch of science that deals with the interaction of organisms and also with the…
Q: If the final or definitive host of a parasitic flatworm were eradicated, what would be the likely…
A: Platyhelminthes are flatworms having many classes of triploblastic and are acoelomate flatworms that…
Q: What is the origin of parasites?
A: Parasitism is a mutual connection between species in which one creature, the parasite, feeds upon or…
Q: What is host specialization? What is host race evolution? Why are they both important?
A: Host organism is an organism which gives shelter to the organism that could be a parasite or an…
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- What is the purpose of an intermediate host for parasite replication? Why have some organisms evolved to use an intermediate host and a definitive host while others just have a definitive host? asapVolvox carteri, an volvocine alga, has approximately 2000 somatic cells and only 16 reproductive or germ line cells. The observation that multicellular individuals, like Volvox, have a much smaller subset of germ line cells compared to somatic cells appears to be general rule. Which of the following is the best evolutionary explanation for why this is the case? A) Organisms can biologically only contain a small number of germ line cells as they are always larger than somatic cells. B) Multicellular individuals with a germ line vs. somatic cell line differentiation only evolved a single time, thus all members of this lineage share the same scheme of more soma cells with a much smaller subset of germ line cells. C) Having a smaller subset of reproductive cells helps reduce the likelihood of cheating from evolving, which in turns prevents the collapse of the multicellular individual system. D) None of the above.What is the origin of parasites?
- What is endosymbiosis and why is it considered to be the source of eukaryotic diversity? Why are we confident this only happened once? What is primary and secondary endosymbiosis? Was there another endosymbiotic event that led to a third lineage? What group of organisms possesses a structure that might suggest this possibility and what is the structure? Why is the structure in question different from the ancestor of other plastids?Explain why the process of endosymbiosis can be viewed asboth an ancient event and a more recent event. What advantages could endosymbiosis give to both the endosymbiontand the host?Which of these is an example of inductive reasoning? A) Hundreds of individuals of a species have been observed and all are photosynthetic; therefore, the species is photosynthetic. B) These organisms live in sunny regions. Therefore, they are using photosynthesis. C) If protists are all single-celled, then they are incapable of aggregating. D) If two species are members of the same genus, they are more alike than each of them could be to a different genus.
- Under the endosymbiotic theory for the origin of the eukaryotic cell. The ancestor of mitochondria and chloroplasts original became part of mutualism with a larger host cell. Which of the following best explains this mutualism? A) The mitochondria and chloroplasts provided specialized reproduction as part of the proto-germ line while the larger host cell provided energy for growth and reproduction. B) The mitochondria and chloroplasts provided gene products that could be used by the larger host cell for improved parasitization. C) The mitochondria and chloroplasts provided molecular energy in return for protection by the larger host cell. D) The mitochondria and chloroplasts produce toxins that the larger cell utilized to defend itself from other cells mutually increasing the defense of all those involved.What is the relationship between the sickle cell mutation and the Plasmodium parasite? Would having the HbSA genotype still be advantageous in a region where such parasites are not common? Why or why not?Is protist dna in a nucleus unicellular or multicellular?According to the phylogeny presented in this chapter which protists are in the same eukaryotic supergroup as plants a) green algae b) dinoflagellates c) red algaed both a and c in a lifecycle with alternation of generations multicellular haploid forms alternate with a unicellular haploid forms b unicellular diploid formsc multicellular haploid forms d) multicellular diploid forms
- Why doesn’t the evolutionary history of Plasmodium follow the classical host–parasite co-speciation pattern?How may host preference eventually lead tospeciation?Recent evidence suggests that symbionts may be pivotal in evolutionary events. How might bacteria be involved with reproductive isolation and with the origins of multicellular animals?